高温高压下矿物岩石电导率的实验研究进展

Progress of high temperature and high pressure experimental study on the electrical conductivity of the minerals and rocks

高温高压下矿物、岩石电性性质的实验研究是了解地球内部物质成分、演化过程及进行地球物理探测资料解释的有力工具.本文主要介绍了高温高压下电导率实验在如何保持良好绝缘性能,如何消除或减小极化效应及如何减小外界电信号对测量信号的干扰等方面的技术、方法,阐述了温度、压力、氧逸度、水含量以及熔体等因素对矿物、岩石电导率的影响以及一些主要的研究结果和进展情况,讨论了电性研究的地球物理和地质意义,并指出了尚需研究的不足之处.

The study of the electrical properties of the minerals and rocks conducted at high temperature and high pressure is a powerful tool to investigate the composition and the geodynamics of the deep interior of the earth. It is also a necessary tool to interpret geophysical field data. In this paper, we have introduced the methods and technologies of the electrical conductivity experiments conducted under the conditions of high temperature and high pressure on how to keep good insulation of measurement systems, how to minimize or eliminate polarization effects and how to minimize the influence on the measurement signals caused by interference. We also investigated the influence of some factors such as temperature, pressure, oxygen fugacity, water and melts on the electrical conductivity and discussed the experimental research progresses. Finally, we have discussed the geophysical and geological significance of the study and pointed out some deficiencies which need more research.